Hermetica Superfood Encyclopedia
Ilex paraguariensis (yerba mate) contains caffeine (0.7-1.7%), chlorogenic acid, and flavonoids that provide stimulant and antioxidant effects. The xanthine alkaloids block adenosine receptors while polyphenols scavenge free radicals and exhibit catalase-like activity.
Origin & History
Ilex paraguariensis, commonly known as yerba mate, is a holly tree native to subtropical South America (Paraguay, southern Brazil, northeastern Argentina, and Uruguay) whose leaves and stems are harvested as the source material. The leaves are typically dried, aged, and ground into a powder or brewed as an infusion, with modern extraction methods including spray-drying to produce concentrated extracts.
Scientific Research
The research dossier lacks specific details on human clinical trials, RCTs, or meta-analyses, with no PubMed PMIDs provided for efficacy outcomes like weight loss, antioxidant effects, or metabolic benefits. While general references note yerba mate's traditional use for stimulant and antioxidant properties, comprehensive clinical data requires direct PubMed consultation as the current results focus on composition rather than clinical trials.
Preparation & Dosage
No clinically studied dosage ranges for extracts, powders, or standardized forms are specified in the available research. Traditional infusion preparation involves 20-50g of dried leaves per liter of water, but this lacks clinical validation. Consult a healthcare provider before starting any new supplement.
Nutritional Profile
Ilex paraguariensis (yerba mate) contains xanthine alkaloids as primary bioactives: caffeine (0.7–1.7% dry weight), theobromine (0.3–0.9%), and theophylline (trace amounts). Polyphenol content is substantial, dominated by chlorogenic acids (1.1–4.8% dry weight, primarily 3-CQA and 5-CQA) and flavonoids including rutin (0.4–0.9%) and quercetin glycosides. Saponins (ursolic and oleanolic acid derivatives, ~0.3–0.5%) contribute bitter notes and bioactive effects. Micronutrient content includes potassium (~900 mg/100g dry), magnesium (~230 mg/100g dry), manganese (~2–3 mg/100g dry, notably high), zinc, and iron. B-vitamins are present in modest amounts (B1, B2, B3, B6). Dietary fiber contributes ~20–30% of dry mass. Protein is approximately 10–15% dry weight, though bioavailability from prepared infusions is negligible. Bioavailability note: chlorogenic acids have moderate absorption (~30% jejunal uptake), with colonic microbiota converting remainder to caffeic and ferulic acids. Caffeine bioavailability from mate infusion is high (>90%), though saponins may slightly modulate gastrointestinal absorption kinetics of co-consumed compounds.
How It Works
Yerba mate's xanthine alkaloids (caffeine, theobromine, theophylline) block adenosine A1 and A2A receptors, preventing drowsiness and enhancing alertness. The polyphenolic compounds, particularly chlorogenic acid and quercetin, neutralize reactive oxygen species and demonstrate catalase-like enzyme activity. These mechanisms combine to provide both central nervous system stimulation and cellular protection against oxidative stress.
Clinical Evidence
Current evidence for yerba mate is primarily limited to in vitro studies demonstrating antioxidant activity, with spray-dried extracts showing catalase-like activity at IC50 2.52 mg/mL. The stimulant effects are well-established through traditional use and the documented presence of caffeine at concentrations of 0.7-1.7%. Human clinical trials are lacking for most purported health benefits. The evidence quality remains low due to the absence of randomized controlled trials with adequate sample sizes.
Safety & Interactions
Yerba mate is generally safe for healthy adults but may cause caffeine-related side effects including jitteriness, insomnia, and increased heart rate. It can interact with stimulant medications, blood thinners, and MAO inhibitors due to its caffeine content. Pregnant and breastfeeding women should limit intake due to caffeine exposure to the fetus. Long-term consumption of very hot yerba mate has been associated with increased esophageal cancer risk in some populations.
Also Known As
Frequently Asked Questions
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Is yerba mate safe during pregnancy or while breastfeeding?
What is the difference between yerba mate leaf, powder, and extract forms?
Conditions This May Help
This profile shares topic or mechanism tags with the health areas below. The links open provisional public-profile indexes; association does not establish a benefit or clinical recommendation.
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